Fold guides



May 13, 195 M. BLUMENKRANTZ FOLD GUIDES 3 Sheets-Sheet 1 Filed July 51,1956 t INVENTOR. ,Wmr BMML-NKEHN 12 y 1958 M. BLUMENKRANTZ 2,834,308

FOLD GUIDES 3 Sheets-Sheet 2 Filed July 51, 1956 4 a 3 a 0 Z 8 z a z 9 15 7 ma 4 L a m MN F H mm Z V K 0 w m a n .2 M 4 n u 4! L i Z B 7 z W K nm 7 v: 0 2 r 0 B 2 Z 1 Z Z a Q u 5 a w u Z. W V 6 3 i v z n a Z Z 5 z 71 z z 0 a I "row 2 M mm M 2 1 m Z 7 8 ,m 5 a 1.... so mm M v u m m z, 41 r .M u M n 1 3 G a f F m I on I w y 13, 1953 M. BLUMENKRANTZ 2,834,308

FOLD GUIDES Filed July 51, 1956 3 Sheets-Sheet 3 INVENTOR. MKIX BumewKErM/rz 2,834,308 FOLD GUIDES Max Blumenkrantz, New York, N. Y.

Original application January 9, 1956, Serial No. 558,149, now Patent No.2,773,266, dated December 11, 1956.

Divided and this application July 31, 1956, Serial No. 601,247

14 Claims. (Cl. 112-139) This invention relates to improvements in foldguides, commonly called folders, and has for an object the provision ofa folder for the formation of a double welt fabric strip wherein theedges of said strip are folded around or about a pair of spaced apartcords so that said edges may be stitched at one pass through a suitabletwospaced needle machine, and thereby said edges are retained inembracing relation with said cords and is a division of applicationSerial Number 558,149, filed January 9, 1956, now Patent No. 2,773,266,dated December ll,v 1956.

Another object of the invention is the provision of a folder havingspaced apart passages therein for a pair of cords and guide means for astrip of fabric, said guide means being adapted to fold the extremitiesof said strip about said cords in such a manner that the extremitiesofsaid strips may be simultaneously stitched adjacent to and outside ofsaid cords for producing a side or cushion boxing to which covers may beattached with invisible stitching.

Other objects and advantages of the invention will be apparent to thoseskilled in the art, upon a study of this specification and theaccompanying drawings.

2,834,303 Patented May 13, 1958 2 to produce a cushion with invisible orconcealed stitches throughout.

A folder 185 shown in Figs. 5 and 6 has brackets 183 with screw holes184 therein to be employed in mounting the folder on a support, as willbe hereinafter ex. plained. The folder 185 has an outer casing 136 whichis tapered, and which has a strengthening bead 187 about its larger end,and which has an elongated slot 188 extending from the bead to a pointspaced apart from the small end 189.

Adjacent to the end having the bead 187 on opposite sides of the outercasing are the brackets 183. above referred to. As shown in Fig; 6, theouter casing 186 has extremities 190 and 191 terminating on lines spacedapart i from each other. The folder has an inner member 192 which formsan inner guide, and this inner guide is identical with the one shown at192a. Supported within the U form of the member 192 are spaced-apartgenerally funnel shaped cord guides 230 and 2 31. Cords are insertedinto these funnel shaped members from the large end of the guide andthey extend forwardly within the body of the guide and as they approachthe small end 189 of the guide the cords are guided by arcuate membersto be presently described. Within the space between the inner member 192and the outer casing a plate portion 193 extends inwardly from the end189 .and joins the portion 192. On each edge of the plate portion 193are arcuate cord guides 194 and 195 that are secured to the edges of theplate portion 193 and face in opposite directions for providing accurateguidance for the cords 176 and 177 (Figures 1 and 2).

Referring to the drawings which are given by way of example toillustrate the invention:

Figure 1 is a view of a longitudinal portion of a welted boxing, whichis shown as an example of one of the many operations performed by themachine;

Figure 2 is a sectional view taken along the line 2-2 of Figure 1;

Figure 3 is a perspective view of one of my improved welt formingdevices;

Figure 4 is a view taken along the line 4-4 of Figure 3; V

Figure 5 is a perspective view of a modified form of welt formingdevice;

Figure 6 is a sectional elevation taken along the line 6-6 of Figure 5;

Figure 7 is a perspective view of a modified form of folder devised toform double welt boxings and the like;

Figure 8 is a view of the folder as seen on the line 8 -8 of Figure 7;

Figure 9 is a cross-sectional elevation taken on the line 9-9 of Figure7, showing a fabric strip being folded around the cords;

Figure 10 is a view showing the double welt boxing as it comesfrom thefolder ready to be delivered to stitching means in the machine; I

Figure 11 is a view showing the boxing after it has been stitched in themachine;

Figure l2is a sectional view take 12-12 of Figure l;

Figure 13 is a cross-sectional view of one of the weits having a coveror the like stitched thereto; and t Figure 14 is a sectional elevationof a portion of a along the line Between the plate portion 193 and theextremities 190 and 191 are elongated laterally disposed U-shapedchannels 196 and 197. Preferably formed integral with the channel 196 isa support member 198 having a slot 199 therein which extends laterallywith respect to the folder body. Secured midway of the plate portion 193is a strip 200 which carries threaded holes to accommodate clampingscrews 201 which pass through the clearance hole or slot 199 and enablesan operator to adjust the channel relative to the lower extremity 202 ofthe web 174.

The other channel 197 has preferably formed integral therewith a supportmember 204, like the one shown at i 198 which also includes a lateralslot and is adjustably secured in the same manner as the one shown at198,

cushion showing how the coveris folded over the stitches a locking screwlike the screw 201 being employed to retain the channel in the properrelation to guide the inner extremity 203 of the Web 174. This meansthat the channels may be adjusted for any desired width of theextremities 202 and 203.

Referring now to Figures 3 and 4, I show a modified form of folderwherein the elements which are substantially identical withcorresponding ones described in connection with Figures 5 and 6 aredesignated by the same numerals used in the latter figures, followed bythe l ter a lib),

The modified folder 210 has mounting brackets 183ti with holes 184therein. This folder has an outer casing 208 which is tapered and whichhas a stifiening bead 187a about its larger end,, and which has anelongated slot 188a in said outer casing and a continuation slot 18817in a hinged top plate 209. This top plate has its I 3 top plate 209about its hinge shaft 214. The stop plate 209 has lateral extensions 211and 212 which are offset upwardly and which extend. laterally at a levelabove that of the plate 209 to overlie and cooperate with curved platesto be presently described.

Secured on the side of the outer casing near the small end is areinforcing plate 221. A curved plate 222 is secured to a straightportion 223 of an arm 224. This arm is curved and it has a screw 225securing it to theplate 221. A screw 226 engages a threaded hole in thearm 224 and forms a settable limit for the minimum distance between thecurved plate 222 and the curved faceof the arcuate cord guide 194a,which is identical with the guide 194 shown in Figures 6 and 7, and suchsetting may be retained by means of the locknut shown. A threaded screw229 is screwed into the plate 221 and extends through a clearance holein the arm 224. A spring 227 embraces the body of 229, and a thumb nut228 is for adjusting the arm 224 so that it exerts a predetermined orwanted urge upon said arm and the curved plate 222 carried thereby.

Secured on the opposite side of the casing is a like reinforcing platewhich is in alignment with the plate 221 and a curved plate 222a issecured to a straight portion of an arm like the arm 224 which is curvedand which has a screw similar to the screw 225 securing it to saidplate, and this group of elements functions in the same.

manner as described for the elements 221 to 228, inelusive.

As stated above, the top plate 209 has offset lateral extensions andthese, as may be seen in the drawings, overlie the curved plates 222aand 222 and thus cooperate with the latter and with the elements 195aand 194a, respectively, and thus the cord with the fabric foldedthereabout is continuously resiliently supported conjointly by theelements 194, 222 and 212, for example, or the corresponding set on theopposite side. Within and secured to the member 192a (Figs. 3 and 4) inany suitable manner are spaced-apart cord guide tubes 230 and 231. Theseguide the cords within the member 192a and deliver them to the cordguides 194a and 195a, respectively.

Operation With both forms of the folder above described, the cords arepushed through the passages via the guides (such as guides 230 and 231)and they exit from the folders engaged by the guides 194 and 195 of theform of folder shown in Figure 5. In the form of folder shown in Figure4, the cords exit from the folder between the guide 194a and itscooperative curved plate 222, on one side and between the guide 195a andthe curved plate 222a on the other side.

These cords are pulled forward, with the presser foot, of the machineupon which the folder is used, raised and when they are far enoughforward to be engaged by the presser foot, the latter is let down, theoperator making sure that the cords lie in grooves provided on themachine with which the folder is used, to accommodate said cords.

Then the fabric strip 174 is fed into the-folder by placing it upon theinner member 192, centralizing it in a lateral sense and then pushing itforwardly (toward the small end 193 of the folder) using the finger inthe slot 188 (or the slot 188a, 18812) to facilitate the operation,thereby causing the fabric web to emerge from the folder in embracingrelation with the two cords. As the machine is operated, the cords areadvanced, so that the fabric embraced cords pass under the presser foot,and the fabric strip 174 is stitched to retain it in said embracingrelation.

Referring now to Figures 7, 8 and 9, I show yet another modified form offolder for forming. a double welt boxing or the like adapted to formcushions with concealed or invisible stitches. This folder is generallyinverted as compared with the other two folders described above. Thisfolder, generally designated by the numeral 330, has a main body 237with sides 238 and 239 extending upwardly and forming a trough. Mountingbrackets 240 and 241 are secured on the outside surfaces of the sides238 and 239 and they carry mounting holes which, when screwed to theplate 178 of the machine by means of screws 207, the discharge end (tobe presently described) is in the proper position to feed the welts tothe presser foot and the needles.

On the underside of the large end of the main body is a reinforcing bead242. The side 238 tapers toward the discharge end, and it has slightlycurved portion 243,

. where the side is depressed inwardly to accommodate a frustro-conicalcord guide tube 247. This tube is soldered, brazed, or otherwisepositively secured on the side 238. It has a reinforcing bead 248 aboutthe large end thereof, and it has a small end 249 adjacent to a curvedcord guide plate 246. The guide 246 is secured on the edge of a curvedportion 245 of the material of the side 238 beyond a notched portion244, and the portion 245 is formed into a semi-circle to bring theremaining flat portion substantially parallel to the small end 250 ofthe main body 237.

The side 239 is also tapered towards the end 250 and it has a similarslightly curved portion (not shown) to accommodate a likefrustro-conical cord guide tube 251, which is positively secured on theside 239. This tube has a reinforcing bead 252 about its larger end. Thesmall end of the tube 251 is positioned adjacent to a cord guide 254 insubstantially the same manner as the small end 249 is described to berelative to the guide 246. The portion 254 is formed into a semi-circleto bring the remaining fiat portion 253 substantially parallel to thesmall end 250 of the main body 237.

The folder has an inner body 331 which is generally U-shaped in sectionat the larger end. It has formed integral therewith substantiallyparallel sides 255 and 256, and the side portion 255 has an angularportion 257, while the side 256 has an angular portion 258. Theseangular portions rest upon the upper edges of the sides 238 and 239, andare secured thereto in certain zones, which will be presently described.The proportions of the sides and the angular portions are such that thespace 259 between the surface of the main body 237 and the inner body331 at the large end, the space 260 between the sides 239 and 256, andthe space 261 between the sides 238 and 255 are substantially equal forthe admittance of fabric web materials into the folder. The larger endof the inner body 331 may be provided with a head or the likereinforcing strip 262.

The angular portion 257, Figure 8, rests upon and is positively securedto the upper edge of the side 238 by means of a line of soldering,brazing or any other suitable means in a zone extending from a point 263to the point where the curved portion 243 borders one edge of thenotched portion 244 as is clearly shown in Figure 7.

The angular portion 258 rests upon and is secured to the upper edge ofthe side 239 in the same manner from a point 263a and within a zone likethat in which the portion 257 is secured to the edge of 238 as justdescribed.

A tongue portion 264 extends forwardly to the discharge end of thefolder, and an extra folding plate 265 is secured on the tongue 264 incooperative relation with the cord guide 246 as shown in Figure 9. Thisfolding plate has a semicircular portion 267, and a straight portion 266which is substantially parallel to the tongue 264, and the straightportion supporting the cord guide 246. It also has a laterally extendingportion 268 which is soldered or otherwise positively secured to thesurface of the tongue 264-. The folding plate 271 overlaps and is alsosecured to the upper surface of an angular portion continuous with theangular portion 258 on the opposite side and lying in a zone extendingfrom a point 269 to a point 270, shown in dotted lines in Figure 7.

The second folding plate 2'71 is substantially identical with thefolding plate 265 and is secured on the tongue 264 in cooperativerelation with the cord guide 254. This folding plate has a semi-circularportion 272 and a straight portion 273 which is substantially parallelto the tongue 264, and the straight portion 253 supporting the cordguide 254. It also has a laterally extending portion 274 which issoldered or otherwise secured to the tongue 264. The folding plate 265overlaps and is also secured to the upper surface of the angular portion257 in a zone extending from a point 288 to a point 290.

An elongated slot 275 is formed in the inner body and has a central axiswhich is substantially central of said inner body to facilitate thepushing of the fabric strips through said folder.

It will be noted that from Figures 1, 2 and 6 that the folders ofFigures 3 and 5 fold the edges of the fabric strip over the cords, andthe strip is stitched between, and yet adjacent to the two welts.However the stitching is visible. v

The folder of Figures 7, 8 and 9 forms a similar fold 281. and 282 ofthe fabric web 276 (whichis inverted), and then as the fabric webreaches the folding plates 271 and 265, extra folds 277 and 278 areformed about the cords 279 and 280, as seen in Figures 9, 10 and 12.

Now, as seen in Figures 11 and 12, a row of stitching 283 is appliedadjacent to but outside of the welt 2'77, and simultaneously with theformation of the row of stitches 283, a second row of stitches 284 isformed adjacent to but outside of the welt 278 at a single pass of thewelt through the machine.

To form a cushion with invisible stitches, a cushion cover 285 isapplied wrong side up by matching its border 286 with the border 278(Figure 13) and securing them and the fold 278 together with a row ofstitching 287. Following this the cushion cover is folded over; as shownin Figure 13 to position the right sideupper most in a horizontal senseand with the web 276 on the front, as shown. The other welt 279 with itsfolds 281 and ,277 may have a bottom cover attached thereto in the samemanner, and the cushion may have any desired kind of stuffing appliedinside.

Although I have herein shown and described by way of exampleimprovements in sewing machines of the type employing loopers forhandling the bottom threads and modifications thereof including means todrop stitches at will and means to changs welts from one width toanother with a minimum of substitutions in the set-up, I am not limitedby the exact structure herein shown and described as many changes may bemade in the arrangements shown and described within the scope of thefollowing claims.

I claim:

1. In a folder for the formation of double welting, a casing having aninlet end and an exit end, said inlet end being larger than said exitend and generally U shaped in cross section, while said exit end issmaller and generally rectangular in form with its lateral sidesrounded, a second casing secured to said first casing and having aportion extending outwardly from said inlet end to form a web supportupon which a web may be fed therethrough, and having an extending plateportion terminating at a point adjacent to said outlet end, saidextending plate portion being supported therein to divide said outletend into upper and lower passages, said plate portion having freelateral edges adjacent to said rounded lateral web adjacent to each ofsaid cords, and longitudinal slot means in the upper surface of theupper of said casings to facilitate the guiding of a fabric webtherethrough during a setup.

. therethrough, and having an extending plate portion tersides, a pairof spaced-apart cord tubes supported by said minating at a pointadjacent to said outlet end; said extending plate portion beingsupported therein to divide said outlet end into upper and lowerpassages, said plate portion having free lateral edges adjacent to saidrounded lateral sides, a pair of spaced-apart cord tubes in said innercasing through which cords are fed to form said welting, said innercasing defining a graded passage between itself and the inner surface ofsaid outer casing, wherein the borders of said fabric web being passedtherethrough are folded about said cords and delivered to doublestitching means which forms a row of stitches in said web adjacent toeach of said cords, and longitudinal slot means in the upper surface ofsaid first or outer casing to facilitate the guiding of a fabric webtherethrough during a setup. I

3. In a folder for the formation of double welting, a casing having aninlet end and an exit end, said inlet end being larger than said exitend and generally U shaped in cross-section, while said exit end issmaller and generally rectangular in form with its lateral sidesrounded, a second casing secured to said first casing and having aportion extending outwardly from said inlet end to form a web supportupon which a web may be fed therethron'gh, and having an extending plateportion terminating at a point adjacent to said outlet end, saidextending plate portion being supported therein to divide said outletend into upper and lower passages, said plate portion having freelateral edges adjacent to said rounded lateral sides, elongated cordguide shoes arcuate in cross-section and carried on said lateral edgesadjacent to and facing the rounded lateral sides of said exit end, apair of spacedapart cord tubes supported by said folder through whichcords are fed to form said welting, said casings conjointly defining agraded passage for the transit of a fabric web therethrough, wherein theborders of said fabric web being passed therethrough are folded aboutsaid cords and delivered to double stitching means which forms a row ofstitches in said web adjacent to each of said cords, and longitudinalslot means in the upper surface of the upper of said casings tofacilitate the guiding of 1 a fabric web therethrough during a setup.

4. In a folder for the formation of double welting, an outer casinghaving an inlet end and an exit end, said inlet end being larger thansaid exit end and generally U shaped in cross-section, while said exitend is smaller and generally rectangular in form with its lateral sidesrounded; an inner casing secured within said outer casing and having aportion extending outwardly from said inlet end to form a web supportover which a web is fed therethrough, and having an extending plateportion terminating at a point adjacent to said outlet end; saidextending plate portion being supported therein to divide said outletend into upper and lower passages, said plate portion having freelateral edges adjacent to said rounded lateral sides, elongated cordguide shoes arcuate in crossection and carried on said lateral edgesadjacent to and facing the rounded lateral sides of said exit end, apair of spacedapart cord tubes in said inner casing through which cordsare fed to form said welting, said inner casing defining a gradedpassage between itself and the inner surface of said outer casing,wherein the borders of said fabric web being passed ,therethrough arefolded about said cords and delivered to double stitching means whichforms a row of stitches in said web adjacent to each of said cords, andlongitudinal slot means in the upper surface of said first or outercasing to facilitate the guiding of a fabric web therethrough during asetup.

5. In a folder body for the formation of double welting, an outer casinghaving an inlet-end and an outlet end, the inlet end being larger thanthe exit end and generally U shaped in cross-section, a panel hinged onto said casing and extending from said exit end to a lateral lineintermediate the ends of said casing, means urging said panel toward itsclosed or normal position, opposed lateral spring loaded guides on thesides of said casing adjacent to said exit end and adapted to applypressure laterally upon said welting, said panel having extensions onopposite sides formed to at least partially overlie said lateral springloaded guides, an inner casing embraced by said outer casing anddefining a graded passage between said casings, said inner casing havinga portion extending outwardly from said inlet end to form a support overwhich a web is fed therethrough and having an extending plate portionhaving free edges and terminating at a point adjacent to said outletend; said extending plate portion being supported therein to divide saidoutlet end into upper and lower passages, elongated arcuate cord guideshoes carried on said free edges of the extending plate and facingoppositely toward said spring loaded guides, a pair of spaced-apart cordtubes secured in said body through which cords are fed to form saidwelting, whereby the borders of a fabric web being passed through saidpassage are folded about said cords and delivered to double stitchingmeans adapted to simultaneously stitch the web about said cords, andbracket means on said body for mounting the same on said stitchingmeans.

6. The invention according to claim in which U- shaped border guidesfacing in opposite directions are supported on said extending plateportion and are adapted to engage the borders of the fabric web passingtherethrough.

7. The invention according to claim 5 in which U- shaped border guidesfacing in opposite directions are adjustably supported on said extendingplate portion and are adapted to be set to be contacted by the bordersof the fabric web passing therethrough.

8. A folder according to claim 1 in which said opposed spring loadedguides on the sides of said casing carry adjusting screws for varyingthe spring load in accordance with the nature of the material of whichsaid welting is formed.

9. A folder according to claim 1 in which said opposed spring loadedguides on the sides of said casing carry adjusting screws for varyingthe spring load in accordance with the nature of the material of whichsaid welting is formed, and settable stop means carried by said opposedspring loaded guides for defining zones in which said spring loadedguides may function.

10. The invention according to claim 1 in which said hinged panel hasits lateral extensions curved and in which said spring loaded guides arealso curved so that both curved elements on each side cooperate tomaintain the borders of said fabric web in embracing relation with thecords.

11. In a folder for the formation of a double welt fabric strip, agenerally U-shaped channeled member having tapered sides, a secondU-shaped channeled member having tapered sides each carrying oppositelydisposed flanges which rest on and are secured to said first sides for asubstantial portion of the length of the latter, notches or gaps formedin said sides near the small end thereof, frustro-conical cord tubessecured on said first sides and bridging said gaps, opposite auxiliaryfolding plates mounted on said second member near the small end thereofand forming oppositely facing U-shaped passages, portions of said firstmember near the small end each being curved and extending toward oneanother and bordered by a. flat portion, and an arcuate cord guide shoesecured to each of said flat portions in cooperative relation to saidauxiliary folding plates, whereby said folder may form an inverteddouble welted strip embracing cords extending through said tubes anddouble stitched along lines between said cords and the edges of saidstrip.

12. In a folder for the formation of welting or the like, an invertedcasing having an inlet end and an exit end, the inlet end being largerthan the exit end and generally U-shaped in cross-section, a pair ofspaced apart cord guides fixed within said casing, an inner casingwithin and shorter than said outer casing and forming a support for saidcord guides, said inner casing being also inverted, and defining agraded passage between itself and the inner surface of said outercasing, wherein the borders of a fabric web being passed therethroughare folded around said cords and adapted to be delivered to doublestitching means which simultaneously forms a row of stitches in each ofsaid webs adjacent to said cords.

13. In a folder for the formation of welting or the like, an invertedcasing having an inlet end and an exit end, the inlet end being largerthan the exit end, a pair of spaced apart cord guide tubes within saidcasing, an inverted inner casing in said outer casing forming a supportfor said cord guide tubes and defining a graded passage between itselfand the inner surface of said outer casing, wherein the borders of afabric web being passed therethrough are folded around said cords anddelivered to double stitching means which forms a row of stitches insaid web adjacent to each of said cords, and longitudinal slot means inthe upper surface of said outer web to facilitate the guiding of afabric web therethrough during a set up.

14. A folder according to claim 13, wherein said passage is generallyU-shaped in cross-section adjacent to one end thereof and generallyC-shaped in cross-section at the other end thereof.

References Cited in the file of this patent UNITED STATES PATENTS192,766 Jonasson July 3, 1877 272,847 Bea Feb. 27, 1883 320,043 BrighamJune 16, 1885 529,415 Schoen Nov. 20, 1894 790,560 De Nike May 23, 19051,123,006 Rathbun Dec. 29, 1914 1,435,661 Rohn Nov. 14, 1922 1,508,695Hill Sept. 16, 1924 1,764,846 Maier June 17, 1930 2,096,330 Le VesconteOct. 19, 1937 2,149,755 Ackerman Mar. 7, 1939 2,659,421 Wass et a1. Nov.17, 1953 2,676,557 Goodwin Apr. 27, 1954 2,711,142 Matthies June 21,1955

